Was looking for CMS to play around with Webstudio.io (also here on Appsumo) and came to kernex.io with unlimited features for four codes.

Function as expected and nothing missing which I need from a headless CMS. The API description is very nice made and helpful.

For the ones who don't use the api to add content it would be nice to have following:
- Adding the option to re-arrange the fields
- Adding a simple export/import (eg CSV file)
- Adding the possibility to add folder structure to the media library

The UI is straight forward and easy to understand, therefore I'm undecided if I would like to see a more modern design with decent colors or blocks to separate the difference areas/items or just leave it as it is...

TLDR: Good headless CMS with unlimited features for 4 codes --> HIGHLY RECOMMENDED